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Product Detailed Parameters
- Description：BIPOLAR GP LOGIC SCHOTTKY
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Logic Type：-
- Number of Circuits：-
- Number of Inputs：-
- Features：-
- Voltage - Supply：-
- Current - Quiescent (Max)：-
- Current - Output High, Low：-
- Input Logic Level - Low：-
- Input Logic Level - High：-
- Max Propagation Delay @ V, Max CL：-
- Operating Temperature：-
- Mounting Type：-
- Supplier Device Package：-
- Package / Case：-
- Grade：-
- Qualification：-
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Overview
The SN74AS158N-J is a quad data selector/multiplexer from the Texas Instruments AS logic family, housed in a 16-pin plastic DIP (N) package. It selects a 4-bit word from one of two sources and routes it to four outputs with inverted polarity. The device features buffered inputs and outputs, a separate strobe input for control, and operates within a supply voltage range of 4.5 V to 5.5 V. It is characterized for operation over an ambient temperature range of 0°C to 70°C.
Feature Summary
- Provides full data selection capability by routing a 4-bit word from dual sources to four outputs
- Delivers inverted data at the output gates to minimize propagation delay time
- Incorporates buffered inputs and outputs for signal integrity
Applications
- Data routing in digital systems
- Signal selection between multiple sources
- Multiplexing applications requiring inverted output logic
Procurement Notes
Verify that the ordering suffix 'J' corresponds to the ceramic or specific military-grade variant if required, as standard catalog parts typically use 'N'. Confirm the datasheet source matches the exact part number, as the provided documentation primarily covers the ALS/AS series generally. Ensure the component meets the specified commercial temperature range of 0°C to 70°C for your application environment.
Selection Notes
Select this component when inverted data output is necessary to reduce propagation delay compared to non-inverting counterparts like the SN74AS157. It is suitable for designs requiring quad multiplexing with buffered I/O. Consider the AS series speed characteristics against power consumption requirements relative to the ALS family.
Part Context
This part belongs to the Texas Instruments 74AS logic family, known for high-speed performance using Advanced Schottky technology. The SN74AS158 specifically provides inverted outputs, distinguishing it from the SN74AS157 which provides true data. It shares functional similarities with the SN74ALS158 but offers faster switching speeds typical of the AS series.
Replacement Considerations
SN74ALS158N provides similar functionality with non-military temperature ratings and slightly different electrical characteristics. SN74AS157N is the direct non-inverting counterpart.
